Include correct license informations for BoringSSL

Motivation:

The used version of BoringSSL is ASL2

Modifications:

Update and so fix license informations for BoringSSL

Result:

Include correct license for BoringSSL

Author: normanmaurer

NOTICE.txt

@@ -45,7 +45,7 @@ This product contains small piece of code to support AIX, taken from netbsd.
 
 This product contains code from boringssl.
 
-  * LICENSE (Combination ISC and OpenSSL license)
-    * license/LICENSE.boringssl.txt (Combination ISC and OpenSSL license)
+  * LICENSE
+    * license/LICENSE.boringssl.txt (Apache License 2.0)
   * HOMEPAGE:
     * https://boringssl.googlesource.com/boringssl/